Motion and Forces Worksheet

Name:

Date:

📚 Part 1: Multiple Choice

1. What is the definition of speed?

The change in direction of an object

The distance travelled divided by the time taken

The push or pull on an object

The mass of an object

2. Which is the correct SI unit for speed?

kilometres per hour (km/h)

metres per second (m/s)

kilometres (km)

seconds (s)

3. Which statement describes balanced forces?

Two forces acting in opposite directions with equal size — no change in motion

Two forces acting in the same direction causing acceleration

No forces acting at all

A single force always causing speed to increase

4. Check all forces that can change the motion of an object:

Friction

Gravity

Mass of the object

An applied push or pull

✏️ Part 2: Calculations, Diagrams & Predictions

5. A runner covers 200 m in 25 s. Calculate the runner's average speed in m/s. Show your working and give the answer with units.

6. A car travels 12 km in 0.25 h.
a) Calculate the average speed in km/h.
b) Convert that speed to m/s (show working).

7. Use the information below. Calculate the average speed for each and state which has the greatest speed.
- A: 150 m in 15 s
- B: 300 m in 30 s
- C: 100 m in 10 s

8. Draw a force diagram for a box sliding to the right across a rough floor while someone pushes it to the right. Include and label all forces (show direction and relative size of arrows).

Explain in one sentence which force opposes the motion and why.

9. Prediction: A toy car is moving to the right. Another toy hits it from behind (from the right), applying a strong push. Describe what will happen to the toy car's speed and direction. Which forces cause this change?

10. Quick concept check: Two equal forces act on an object in opposite directions. What is the net force and how will the object's motion be affected?